On Mon, 3 Aug 1998, Ken Manheimer wrote:
I have a question for any sendmail.cf wizards out there - a hack to a recent cf ruleset (mine is from 8.9.0) to circumvent what i consider a bug, or at least a misfeature, that interferes with using sendmail for "virtual hosting".
The problem was that no matter what i did (building the cf with masquerading, virtual user, whatever it was), the "to:" header of messages posted to a maillist was always transformed to the primary address of the host where the maillist was situated, even when the original message was addressed to one of the "virtual" host addrs. I eventually poked and prodded in the rulesets (shudder), and discovered that commenting out one rule, which is supposed to use the name server to canonicalize an address, prevents that transformation from happening. (It's part of ruleset 96, which was apparently is "the bottom half of ruleset 3" - boy, i *do not like* touching cf ruleset code!)
Hmmmm... I have a Debian linux system with Sendmail 8.8.5 on it,and I actually have this working. I didn't have to change the sendmail.cf by hand, tho. My cf is generated by the sendmailconfig tool that comes with debian (tho' I do grok sendmail.cf's reasonabally well), which uses M4.
The keys to getting this to work are:
1) use the limited_masquerade feature (see sendmail.org website)
2) the vhost name must be in class w (i.e. in the sendmail.cw
file, usually)
3) The major key is your DNS setup. the vhost has to have an
Address record, or just an MX. It can't be a CNAME (I think
this is spec'ed in the RFC's somewhere. )
-The Dragon De Monsyne